var express = require('express')
var path = require('path')
var favicon = require('serve-favicon')
var logger = require('morgan')
var cookieParser = require('cookie-parser')
var bodyParser = require('body-parser')
var session = require('express-session')
// 加载ueditor 模块
var ueditor = require('ueditor')
// 图片验证码
var svgCaptcha = require('svg-captcha')

var app = express()
var mongoose = require('./config/mongoose.js')
var db = mongoose()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.engine('.html', require('ejs').__express)
app.set('view engine', 'html')

app.use(logger('dev'))
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }))
app.use(cookieParser())
app.use(express.static(path.join(__dirname, 'public')))

// 这里周期只设置为20秒，为了方便测试
// secret在正式用的时候务必修改
// express中间件顺序要和下面一致

app.use(session({ // session持久化配置
  secret: 'jxchexie',
  key: 'jxchexie',
  cookie: { maxAge: 1000 * 60 * 60 * 24 * 30 }, // 超时时间
  saveUninitialized: true,
  resave: false
}))

// ueditor上传图片
app.use('/ueditor/ue', ueditor(path.join(__dirname, 'public'), function (req, res, next) {
  // ueditor 客户发起上传图片请求
  if (req.query.action === 'uploadimage') {
    var foo = req.ueditor
    var imgname = req.ueditor.filename
    var img_url = '/images/ueditor/'
    res.ue_up(img_url); // 你只要输入要保存的地址 。保存操作交给ueditor来做
    res.setHeader('Content-Type', 'text/html'); // IE8下载需要设置返回头尾text/html 不然json返回文件会被直接下载打开
  }
  //  客户端发起图片列表请求
  else if (req.query.action === 'listimage') {
    var dir_url = '/images/ueditor/'
    res.ue_list(dir_url); // 客户端会列出 dir_url 目录下的所有图片
  }
  // 客户端发起其它请求
  else {
    // console.log('config.json')
    res.setHeader('Content-Type', 'application/json')
    res.redirect('/ueditor/jsp/config.json')
  }
}))
// ueditor上传图片

app.get('/captcha', function (req, res) {
  var captcha = svgCaptcha.create({
    size: 4, // 验证码长度
    ignoreChars: '0o1i', // 验证码字符中排除 0o1i
    noise: 1, // 干扰线条的数量
    color: true, // 验证码的字符是否有颜色，默认没有，如果设定了背景，则默认有
    background: '#c4c4c5' // background color of the svg image
  })
  // 将生成的验证码放在session中
  req.session.captcha = captcha.text
  console.log(req.session.captcha)
  res.set('Content-Type', 'image/svg+xml')
  res.status(200).send(captcha.data)
})

// cors
app.all('*', function (req, res, next) {
  // 设置允许跨域的域名，*代表允许任意域名跨域
  // res.header("Access-Control-Allow-Origin","http://localhost:8800")
  res.header('Access-Control-Allow-Origin', 'http://buy.giscafer.com')
  // 允许的header类型
  res.header('Access-Control-Allow-Headers', 'content-type')
  // 跨域允许的请求方式 
  res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,OPTIONS')
  if (req.method.toLowerCase() == 'options') {
    res.send(200); // 让options尝试请求快速结束
  } else {
    next()
  }
})

require('./routes/index')(app)

/*官网后台做操作是需要，登录验证*/
app.use(function (req, res, next) {
  if (!req.session.user) {
    if (req.url == '/login' || req.url == '/register') {
      next(); // 如果请求的地址是登录则通过，进行下一个请求
    } else {
      res.redirect('/login')
    }
  } else if (req.session.user) {
    next()
  }
})

/*后台登录验证*/

require('./routes/admin')(app)

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  var err = new Error('Not Found')
  err.status = 404
  next(err)
})

// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function (err, req, res, next) {
    const { user = {}, isSuper, isVisitor } = getUserInfo(req)
    res.status(err.status || 500)
    res.render('website/index/error', {
      message: err.message,
      error: err,
      isVisitor, username: user.username, isSuper: isSuper
    })
  })
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
  res.status(err.status || 500)
  const { user = {}, isSuper, isVisitor } = getUserInfo(req)
  res.render('website/index/error', {
    message: err.message,
    error: {},
    isVisitor, username: user.username, isSuper: isSuper
  })
})

function getUserInfo(req) {
  var isVisitor = false
  if (req.session.user && req.session.user.status == '-1') {
    isVisitor = true
  }
  var isSuper = ''
  if (req.session.user && req.session.user.status === '2') {
    isSuper = '超级管理员'
  } else if (req.session.user && req.session.user.status == '-1') {
    // 访客
    isSuper = false
  } else if (req.session.user && req.session.user.status === '1') {
    isSuper = '普通管理员'
  }

  return {
    isVisitor,
    isSuper,
    user: req.session.user || {}
  }
}

module.exports = app
